Amplitude and Phase Modulation for Ultrasonic Wireless Communication

Short range wireless communications have been used more and more frequently in the peoples' life. But the electromagnetic fields waves also have some disadvantages. One of these disadvantages is health problems. Many papers show the electromagnetic field waves using for communication may damage their health. And in most hospitals, they also have bans on the use of mobile phones and wide area networks because of electromagnetic interference. So this paper studied the use of ultrasound for wireless communication in air, instead of using electromagnetic field wave.